Question

The heat required to convert 2 kg of ice at -10$^\circ$ C to water at 10$^\circ$ C at standard atmospheric pressure is (specific heat capacity of ice = 2100 Jkg$^{-1}$ K$^{-1}$, specific heat capacity of water = 4200 Jkg$^{-1}$ K$^{-1}$, Latent heat of fusion of ice = $3.35 \times 10^5$ Jkg$^{-1}$)

• A. 210 kJ
• B. 335 kJ
• C. 398 kJ
• D. 420 kJ
• E. 796 kJ

Hint:

Always ensure you use the correct specific heat capacity for each phase (ice vs. water). A common mistake is using 4200 for the ice phase as well.

Answer 1

Answer: (E)